Overlooked role of boron precursors in tuning engineered zero-valent iron to activate peracetic acid for sustainable micropollutant oxidation

Applied Catalysis B: Environment and Energy Pub Date : 2024-09-08 DOI:10.1016/j.apcatb.2024.124580

Yunzhe Zheng, Xinhao Wang, Yudan Dong, Xiaoyu Wu, Donghua Xie, Yang Liu, Peng Zhou, Zhaokun Xiong, Chuan-Shu He, Bo Lai

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Abstract

This work comprehensively investigated how the characteristics of boron (B) precursors affect the catalytic activity of microscale zero-valent iron (mZVI) towards peracetic acid (PAA) activation for micropollutant degradation. Three boron precursors were introduced into mZVI by ball milling with their physical-chemical properties carefully characterized, and their ability to activate PAA comprehensively evaluated via sulfamethoxazole (SMX) oxidation efficiency. It’s found that BO-ZVI demonstrated the highest capability to activate PAA for SMX degradation, with 2 ∼ 3 times higher than NaBO-ZVI and HBO-ZVI. Specially, B precursors regulate the ability of mZVI to activate PAA via the following two aspects: (1) affecting the formation and content of FeB to accelerate Fe(II) regeneration; (2) increasing the hydrophilicity of the iron particles and the affinity of B-ZVI for binding PAA to different extent. This study highlights the important role of boron precursors in tuning engineered mZVI to initiate Fenton-like process for water purification.

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硼前体在调整工程零价铁以激活过乙酸从而实现可持续微污染物氧化过程中的作用被忽视了

这项研究全面探讨了硼（B）前体的特性如何影响微尺度零价铁（mZVI）活化过乙酸（PAA）降解微污染物的催化活性。研究人员通过球磨将三种硼前驱体引入 mZVI，并对其物理化学性质进行了仔细的表征，同时通过磺胺甲噁唑（SMX）氧化效率对其活化 PAA 的能力进行了全面的评估。研究发现，BO-ZVI 活化 PAA 降解 SMX 的能力最强，是 NaBO-ZVI 和 HBO-ZVI 的 2 ∼ 3 倍。特别地，硼前驱体通过以下两个方面调节 mZVI 活化 PAA 的能力：（1）影响 FeB 的形成和含量，加速 Fe（II）的再生；（2）在不同程度上增加铁颗粒的亲水性和 B-ZVI 与 PAA 结合的亲和力。这项研究强调了硼前体在调整工程 mZVI 以启动用于水净化的 Fenton 类过程中的重要作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Applied Catalysis B: Environment and Energy

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